!function(a,b){var c=a.documentElement,d="orientationchange"in window?"orientationchange":"resize",e=function(){var a=c.clientWidth;a&&(a>=750&&(a=750),c.style.fontSize=100*(a/750)+"px")};a.addEventListener&&(b.addEventListener(d,e,!1),e())}(document,window);
//截取url上的参数 
function getQueryString(name) {
		var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
		var r = window.location.search.substr(1).match(reg);
		if ( r != null ){
			 return unescape(r[2]);
		}else{
			 return null;
		} 
}
